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Immunohistochemical features of mucoepidermoid carcinoma of the breast. A, Most intermediate and epidermoid cells expressed CK 5/6 (immunohistochemistry reactions, ×200). B, CK 7 was mainly observed in the cells composing the central part of the neoplastic nests and in the cells lining glandular and cystic spaces (immunohistochemistry reactions, ×200). C, Both basaloid and intermediate cells were positive for p63 (immunohistochemistry reactions, ×200). CK = cytokeratin.
